SRS 23 years Professional in PV intelligent application,solar powered street lights.
When the solar street lamp leaves the factory, the working time has been set according to the customer's requirement. The starting and closing time of the solar street lamp is determined by the controller of the street lamp. The controller is mostly located inside the cabin door. The controller adjusts the break-motion adjustment and the remote control adjustment. The external adjustment button can be adjusted manually. However, most of the controllers on the market are remote control adjustments.
The way solar street lamp adjust time
1. The charging circuit adopts double MOS series control loop, so that the voltage loss of the circuit is nearly half less than that of the diode charge, and the power consumption is greatly increased by using PWM energy-saving control.
2. The load mode is controlled by pure light. When the light sensor senses that the light is dim, the light will turn on automatically.
3.Scientific battery management, when it is over-discharge, battery voltage to promote charging, maintenance compensation after normal use, using direct charging and floating charging to connect the charging battery, at the same time with high precision temperature compensation, charge more accurate control.
4. All constraints of industrial-grade chips and closed components operate normally in cold, high temperature, humidity, etc. Meanwhile, crystal time control is used to make the time control more accurate.
The above is about solar street lights on how to adjust the time to explain, solar street lights how to adjust the time to see whether it is a waterproof controller, the general waterproof controller does not have a digital display function.
How solar street lamps work
Day: the solar panel absorbs the solar spectrum to generate electricity, which is converted by the controller and stored in the battery. At night: the power in the battery is converted by the controller to drive the LED light source.
The Solar street lamp is composed of solar panel, battery, controller, light source, lamp pole, etc. Next, we will introduce the core components of solar street lamp.
The main component -- solar panels
Solar panels -- also known as "solar chips" or "photovoltaic cells" -- are thin sheets of photovoltaic semiconductors that use sunlight to generate electricity directly. Solar cells are devices that convert light energy into electricity directly through the photoelectric effect or photochemical effect. Polysilicon and monocrystalline silicon solar cells based on photoelectric effect are the mainstream. The sun shines on the semiconductor p-n junction, creating a new hole, the electron pair. Under the action of the p-n junction electric field, the holes flow from the n-region to the p-region, and the electrons flow from the p-region to the n-region, and a current is formed by closing the circuit.
Solar cell classification: Mono crystal silicon cell, polysilicon cell, amorphous silicon cell, thin-film cell
Solar cell type
Solar cells vary greatly in various categories, as follows:
Main components - battery
The storage of electrical energy for chemical energy, need to discharge when the chemical energy into electrical energy again, will be called this kind of battery.
There are generally lead-acid batteries, ni-cd batteries, ni-h batteries, lithium batteries. The choice of battery capacity should generally follow the following principles: first, under the premise of meeting the requirements of night lighting, the energy of solar cell modules in the day should be stored as far as possible, and at the same time, the energy required to meet the requirements of continuous cloudy and rainy night lighting should be stored. Battery capacity is too small to meet the needs of night lighting, the battery is too large, battery energy can not be used up, resulting in waste. The accumulator should be matched with the solar cell and the electric load (street lamp). There is a simple way to determine the relationship between them. The battery capacity is required to meet the sum of the energy consumed in cloudy and rainy days, and the power of the solar panel is sufficient to recharge the battery in a day of effective light.
Performance comparison of different battery systems
Performance comparison of different lithium battery materials
Main components - photovoltaic controller
Photovoltaic controller: an automatic control device that controls the charging of a battery by a solar panel and the supply of electricity from the battery to the load. No matter the size of the solar street lamp, good performance of the charging and the discharging controller is indispensable. In order to prolong the service life of the battery, the charging and discharging conditions must be limited to prevent the overcharging and deep discharging of the battery. In the place where the temperature difference is large, the qualified controller should also have the function of temperature compensation.
Features of the photovoltaic controller:
1. Perfect protection functions: overtemperature, reverse connection, short circuit, overcurrent, overcharge/discharge, etc.
2, power regulation: according to the daily charge, automatically adjust the discharge power
3. Historical data: it can read the historical data of 7 days' work
4. Status indicator: indicates the current working status
5. Solar panel maximum efficiency tracking
Main components - LED light source
LED (Light Emitting Diode) is a solid-state semiconductor device. The carrier in the semiconductor produces Light by combining it with the photon reflection. It has the advantages of high brightness, energy consumption, long life, fast start, small power, no stroboscopic, and not easy to produce visual fatigue.
Placement of LED beads
LED bead features:
1. Small size. LED is basically a small chip encapsulated in epoxy resin, so it is very small and light.
2, long service life, the theoretical service life of 100,000 hours, the actual service life of more than 50,000 hours.
3, environmental protection, LED materials are made of environmental protection materials, do not contain toxic pollution substances.
4. Energy-saving. Compared with ordinary incandescent lamps and fluorescent lamps, LED lamps with the same power only have 1/6 of the power of incandescent lamps and 1/2 of the power of fluorescent lamps
Solar street lamp poles
The height of the solar street lamp pole should be determined according to the width of the road, the distance between lamps and lanterns, and the illumination standard of the road. According to the local characteristics of the lamp poles are equipped with characteristics, so that the solar street lamp poles take into account beautiful and energy-saving characteristics.
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